Corner-strip.



' No. 741,288. I PATENTED 001". 13, 1903. 'F. L. UNION. CORNERSTRIP.

APPLICATION FILED MAR..27, 1902.

N0 MODEL.

llnTTnn NTnTns Patented October 13, 1903.

FRANK L. UNION, OF CHICAGO, ILLINOIS.

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SPECIFICATION forming part of Letters Patent No. 741,288, dated October 13, 1903.

Application filed March 27,1902. Serial No. 100,267. (No model.)

To (tZZ whom it may concern:

Be it known that I, FRANK L. UNION, acitizen of the United States, residing in Chicago, county of Cook, and State of Illinois, have invented certain new and useful Improvements in Corner Strips or Beads, of which the following is a specification.

My invention relates to supports for plaster or lathing, while it particularly relates to such supports to be situated at or approximate to projections on or angles of walls, ceilings, or surfaces forming a part thereof or secured thereto; and its object is to provide a corner-strip which will effectively retain plaster or lathing in place at or about said projections or angles, be of comparatively slight cost to manufacture, be readily put into position to perform its functions,

retain or key the plaster in proper place, and.

be constructed in chief of light-weight metal in such form that in combination with reinforcing means it will effectively resist a shock or pressure of considerable violence without being permanently bent out of shape or pushed from coincident alinement with the edge of the corner or angle, thus assuring a retention of the plaster or lathing in proper position at or approximate to the corner so protected; and to these ends it consists in the features of construction and combination to be hereinafter more fully described, and pointed out in the claims hereto annexed.

Referring to the accompanying drawings, wherein like reference-letters indicate the same or corresponding parts, Figure 1 is a cross-sectional View, and Fig. 2 a perspective view, of my improved device. Fig. 3 is a longitudinal sectional View of a modification of my device to be hereinafter more fully described.

The more clearly to set forth theadvantages of the device of my invention over the devices now known to the art I will now refer under general headings to such known devices and briefiypoint out their objectionable features.

1. Devices wherein the web of the cornerpiece is formed of asingle thickness of metal. This form of device, whether the web of a single thickness be secured either at one or both sides of the corner of the wall, is objec= tionable for want of rigidity. In order to be commercially practicable, corner-strips must of necessity be composed of thin light-weight material.

2. Built-up corner-strips composed of several layers of material are objectionable because of their extreme cost to manufacture, the mechanical niceiy with which the parts must be secured together, and the quantity of material employed in their construction. This class of corner-strips where the web by reason of the connection of the parts thereof one with another forms to all intents and purposes a single piece of metal is subject also to the objection set forth as incident to those referred to in class 1.

3. Corner-strips the rear portion of the bead of which presents a sharpened outer edge or surface are objectionable because said edge, being in contact with the plaster, will when the strip is jarred or pressed upon cut thereinto and cause it to break or crumble.

4. Devices made of a single piece of metal the web of which is formed of two portions thereof parallel or substantially parallel to each other 'are objectionable for want of rigidity, and this objection increases as the distance separating the two portions forming the Web decreases.

5. Corner-strips which are not themselves directly secured to the wall or studding-post, but are retained thereat by means of clips or otherwise and supported away from contact with the wall or post, are objectionable for want of rigidity, as well as because of the multiplicity of the parts required both in the construction of the strip and the securing means therefor.

In constructing my device I employa continuous strip of sheet metal, which I bend in such manner and by any suitable means that the exterior face of a portion of the bead or bight a formed thereby will be approximately semicircular in form in cross-section, while the rear portion of the bight will form inwardly-converging shoulders a (1 while the members a a, composing the web and the base of the strip, are respectively outwardly bent from the inner edge of the shoulders at a and are provided with suitable perforations 04 to receive and key the plaster to the strip and are further provided with any suitable means, as nail holes a for securing them to the corner or angle, the one at one side, the other at the other side thereof. The reinforcing-bar r brace-rod B is preferably frictionally, but it may be in any suitable manner,retained within the bead or bight,and it in part approximately conforms to the inner shape thereof,its rear face,however, being fiat, or substantially so, and bearing against the shoulders a 0.

When the strip of my invention is properly secured by nails 0, or other suitable means at or about the edge of the angle to be protected and in coincident line therewith,should a shock be imparted to the bead it will be communicated to the reinforcing-rod B and thence to the in wardly-converging shoulders, which by reason of their form will operate in the manner of springs to counteract the effect of the shock. Should, however, the shock be of such violence as to overcome the spring resistance offered by the shoulders, it will be imparted to the members a (1 constituting the web, which will by reason of their form also act as resisting-springs and be bent inwardly to a greater or less extent; but whether the shock to the strip be slight or of considerable violence it will be observed that the spring action of the parts affected thereby will tend to overcome it and in so doing will be forcedout of their normal positions and be bent inwardly toward each other and away from the plaster O, which is applied in usual manner, instead of being bent outwardly and against the plaster, in which latter case they would crack or crumble the same.

WVhenever it is necessary or advisable in order tov protect a corner to employ a plurality of strips which will abut the one against another, I prefer that, as shown in Fig. 3, one of two adjacent strips be provided with arein forcing-rod which shall project beyond the end of its bead or bight, so that when said strips are properly adjusted in place the rod of the one strip will project into the bead or bight of the other, thereby locking the strips together, and this interlocking function of the brace-rod while it does not form an essential element of all the claims to my invention is nevertheless an important feature in certain of them.

Having thus described my invention, what I claim as new, and desire to secure by Letters Patent, is-

1. The combination of a plurality of cornerstrips and a reinforcing-rod secured within the bead of one of said strips and engaging the bead of the adjacent strip, substantially as described.

2. The combination of a plurality of cornerstrips and a reinforcing-rod secured within the head of one of said strips and engaging and reinforcing a portion of the head of the adjacent strip, substantially as described. FRANK L. UNION.

Witnesses:

CHARLES S. HILL, H. Y. MICHAELSON. 

